Improvement in leather flap-valves



W. L. ORAWLEY. Leather Flap-Valve.

1 No. 217201. Patented July 8, 1879..

27662.- nwnfan wwgaau /rwy fl/ UNITED STATES PATENT OEErcE.

WILLIAM L. ORAWLEY, OF NEWARK, NEW JERSEY, ASSIGNOR OF ONE- HALF HISRIGHT TO THEODORE F. LEMASSENA.

IMPROVEMENT IN LEATH ER FLAP-VALVES.

Specification forming part of Letters Patent No. 217,201, dated July 8,1879; application filed May 15, 1879.

. To all whom it may concern:

Be it known that I, WILLIAM L. GRAWLEY, of the city of Newark, in thecounty of Essex and State of New Jersey, have invented a new and usefulImprovement in Leather Flap- Valves, which improvement is fullydescribed in the following specification.

My invention relates to an improvement in leather flap-valves; andconsists in a novel arrangement of the valve upon a removable metallicseat, and in the combination of the said seat with a clampin g-rin g,and with a lifting-pump secured to the said ring in the man-.

ner described.

Figure l of the drawings shows the upper side of the clamping-ring withthe valve held thereby. Fig. 2 is atransverse section on line a; m, Fig.1, the valve being partially opened; and Fig. 3 is a view of the lowerside of the valve, showing the removable valve-seat.

A is the clamping-ring, formed with a depending flange, a, for attachingthe valve to a and is made smaller than theaperture to, to

afl'ord' an annular seat for the leather to resist fluid-pressure 0n theside toward A, the leather valve being cut loose from the part clampedbetween the seat and ring A, with the exception of a portion at oneside, 0, to serve as a hinge for the valve. The valve is supplied with aweight, D, riveted or screwed to the same by the aid of a washer, e, andscrew or rivet d.

At f is shown a portion of a tube, secured to the flange a, bysoldering, to show the ordinary mode of connecting such valves to a pumpor pipe. When used as the foot-valve for a pump, the flange a isprovided with feet g, or

projections on its lower edge, to raise the valve from the bottom of theboat or barrel, &c., in which it may be used.

It having been hitherto customary to form the valve-seat on the upperside of the ring A, which is commonly soldered to the bottom of suchpumps, and to clamp the valve to the upper surface of the seat insidethe pump by a ring similar to that shown at B, it is evident that thevalve could not be removed to replace a new leather without unsolderingthe ring from the bottom of the pump-an operation which frequentlyrequired the pump to be laid aside until a suitable mechanic could befound.

By the method of construction I have shown and described herein thisdifficulty is entirely obviated, as the valve-seat is the removablepart, and the clamping-rin g is the part attached to the bottom of thepump, the smaller aperture I) being made in the loose or removable pieceB, which thereby resists the pressure transmitted through the largeraperture a in the tight piece A, which may thus be permanently securedto the pump, or in any situa tion where its action may be desired.

The removal of the screws 1), which can be done by any person capable ofrenewing or replacing the valve (3, enables the seatB to be removed andthe valve repaired or examined at pleasure. This change in constructionis of great importance upon canal-boats, ships, and other places wherethe valve is subjectedv to rough usage, and frequently requires a newvalve in locations remote from a tinsmith.

I therefore claim my invention as follows:

The combination of the valve O with the removable seat B, provided withaperture b, smaller than the valve, and with the ring A, having anaperture, a, larger than the valve, to permit its rise and fall upon itsseat, substantially as and for the purpose set forth.

In testimony that I claim the foregoing I have hereto set my hand this12th day of May, 1879-. I

WM. L. OItAWLEY. Witnesses:

WM. L. BREATH, EDWARD F. WHELAN.

